We report the kinetics and molecular properties of CD38 purified from bovine lung microsomal membranes after its solubilization with Triton X-100. The enzyme was found to be a novel member of a multicatalytic NAD+ - glycohydrolase (NADase, EC 3.2.2.6). It was able to utilize NAD+ in different ways, producing nicotinamide (Nam) and either adenosine diphosphoribose (ADPR, NADase activity) or cyclic ADPR (cADPR, cyclase activity); it also catalyzed the hydrolysis of cADPR to ADPR (cADPR, hydrolase activity). In addition, the enzyme catalyzed the pyridine base exchange reaction with conversion of NAD+ into NAD analogues. These data are evidence that CD38 is involved in the regulation of both NAD+ and calcium mobilizing agents, the concentration resulting in an essential enzyme that plays a key role in cellular energy and signal-transduction systems.

CD38 in bovine lung: a multicatalytic NADase

POLZONETTI, Valeria;PUCCIARELLI, Stefania;VITA, Alberto;VINCENZETTI, Silvia;NATALINI, Paolo
2009-01-01

Abstract

We report the kinetics and molecular properties of CD38 purified from bovine lung microsomal membranes after its solubilization with Triton X-100. The enzyme was found to be a novel member of a multicatalytic NAD+ - glycohydrolase (NADase, EC 3.2.2.6). It was able to utilize NAD+ in different ways, producing nicotinamide (Nam) and either adenosine diphosphoribose (ADPR, NADase activity) or cyclic ADPR (cADPR, cyclase activity); it also catalyzed the hydrolysis of cADPR to ADPR (cADPR, hydrolase activity). In addition, the enzyme catalyzed the pyridine base exchange reaction with conversion of NAD+ into NAD analogues. These data are evidence that CD38 is involved in the regulation of both NAD+ and calcium mobilizing agents, the concentration resulting in an essential enzyme that plays a key role in cellular energy and signal-transduction systems.
2009
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/104789
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